Is there a difference between setting the car air conditioner to level 1 and level 4?

[StAndrew]

There is a difference between setting the car air conditioner to level 1 and level 4. The specific differences are as follows: 1. Fuel consumption: It will increase fuel consumption, but not significantly. This is because the compressor is driven by the engine belt, and its speed is only related to the engine. However, lowering or raising the level only changes the speed of the blower fan inside the car. A higher fan speed consumes more electricity, and the car's electricity can only be generated by consuming gasoline. 2. Power: Generally, the power of a car air conditioner's compressor is not adjustable; it only has two states: on or off. Setting the air conditioner to level 4 will feel cooler than level 1, but this is only due to the difference in heat exchange efficiency, not because the compressor works at a higher power at level 4 compared to level 1.

[Sandy]

There is indeed a difference between setting the car air conditioner to level 1 and level 4. Level 1 is low-speed air, with lower wind speed and noise, providing a quiet and comfortable experience, suitable for city commuting or long-distance driving. The car won’t be too noisy, and although the cooling speed is slower, it’s still sufficient. Level 4 is the highest wind speed, with much stronger airflow and significantly louder noise, cooling or heating the car super quickly. It can drop the interior temperature in no time, especially effective after the car has been exposed to intense summer heat. However, the trade-off is higher power consumption, putting more load on the car battery or engine, which is more noticeable in smaller-displacement vehicles. Frequent long-term use of level 4 may accelerate wear on the fan motor, so it’s recommended to use it only when urgently needed. Normally, using lower settings saves fuel and is more environmentally friendly. For defogging the windshield, level 1 works slower, while level 4 can clear it quickly—safety comes first. In short, choose the setting based on the situation, and don’t always default to level 4.

[AllieRose]

There's a big difference between AC level 1 and level 4. Level 1 feels like a gentle breeze, almost silent, providing relaxing airflow that keeps drivers calm without ear fatigue. Cooling is gradual but maintains stable temperature. Level 4 is storm mode - loud whooshing sounds become particularly noticeable at highway speeds. It cools rapidly (1-2 minutes) but compromises passenger comfort, easily disturbing children/elderly sleep. Energy consumption differs significantly: Level 1 saves power with minimal fuel impact, while Level 4's high electricity draw increases fuel consumption, especially in traffic. For economy, prioritize Level 1 for daily use, reserving Level 4 for urgent cooling or defogging. Remember to clean AC filters regularly - airflow changes won't help if dust accumulation blocks ventilation, regardless of fan speed.

[DeVictoria]

There is a clear difference between air conditioning setting 1 and 4. Setting 1 has gentle wind speed, low noise, slower cooling but higher comfort; setting 4 has strong wind, loud noise, and faster cooling. The key to safe usage is that higher settings can accelerate defogging and defrosting, improving visibility safety; lower settings are suitable for maintaining a stable in-car environment. For daily driving, setting 1 is more worry-free.